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Fuels and Combustion

Fuels and Combustion
Gobar gas is produced by the __________ of cown dung.

Oxidation
None of these
Fermentation
Hydrogenation

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Fuels and Combustion
Which of the following oil gasification processes is non-catalytic?

Segas process
Steam reforming of naphtha
Onia-Gegi process
Semet-Solvay process

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Fuels and Combustion
Pure carbon is completely burnt in oxygen. The flue gas analysis is 70%CO₂, 20%CO and 10%O₂. The percent excess oxygen used is

0
12.5
10
20

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Fuels and Combustion
Stoichiometric combustion of 12 kg of carbon requires __________ of oxygen.

All of these
32 kg
22.4 Nm³
1kg mole

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Fuels and Combustion
Mineral matter content (M) and ash content (A) in coal are approximately related as

M = 1.1A
M = 2A
M = 1.5A
M = A

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Fuels and Combustion
Preheating of combustion air is done to

Increase the calorific value of the fuel
Complete the combustion of fuel
Reduce its requirement for effecting the complete combustion
Increase the adiabatic flame temperature

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